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Braking device and method for vertical axis wind driven generator

A technology for wind turbines and braking devices is applied in the control of wind turbines, wind turbines at right angles to the wind direction, wind turbines and other directions, which can solve the problems of high manufacturing and maintenance costs, complex structures, etc. Improved safety and impact avoidance effect

Inactive Publication Date: 2011-09-21
NAT WIND ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the horizontal axis wind turbine is widely used, but it has the disadvantages of complex structure, high manufacturing and maintenance costs, etc.

Method used

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  • Braking device and method for vertical axis wind driven generator
  • Braking device and method for vertical axis wind driven generator
  • Braking device and method for vertical axis wind driven generator

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Embodiment Construction

[0015] Existing horizontal-axis wind turbines need to reduce the speed of the wind rotor by yaw and other methods after the wind speed exceeds the predetermined safety range. Emergency brakes etc. are forced to stop for self-protection. Vertical axis wind turbines cannot yaw to reduce the windward area to reduce the braking force requirements of the mechanical braking device in strong winds. Instead, they need to reduce and limit the speed through mechanical braking and increase the braking torque of the generator to control the wind. The method of wheel input torque is used to protect the unit. When the wind rotor input torque of the wind turbine is greater than the braking torque limit of the wind generator, mechanical braking must be used to provide additional braking force to control the generator speed to not exceed the maximum speed for safe operation. In extreme cases, when the generator fails or the power grid fails to output electric energy, the mechanical braking de...

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Abstract

The invention discloses a braking device and method for a vertical axis wind driven generator. The braking device for the vertical axis wind driven generator comprises a braking disc, a brake support and a mechanical brake, wherein the braking disc is connected with a generator rotor, the brake support is arranged on a fixed rotating shaft and the mechanical brake is arranged on the brake support. The braking device for the vertical axis wind driven generator is as follows: when the braking is needed, a jaw of the mechanical brake is closed so that an upper frictional plate and a lower frictional plate are pressed on the braking disc and the generator rotor is braked; and when the braking needs to be released, the jaw of the mechanical brake is opened so that the generator rotor can rotate. By means of the braking device for the vertical axis wind driven generator and the braking method adopting the braking device, the emergency shutdown in case of high wind speed is avoided, not only the safety of the vertical axis wind driven generator is increased, but also the overlarge impact on power grids is avoided.

Description

technical field [0001] The invention relates to a braking device for a vertical axis wind power generator, and also relates to a braking method of the braking device. Background technique [0002] Wind energy is the most promising renewable energy besides water energy, and has been highly valued by countries all over the world. [0003] Wind turbines are classified according to the direction of the rotation axis, which can be divided into two types: horizontal axis and vertical axis. At present, the horizontal axis wind turbine is widely used, but it has the disadvantages of complex structure, high manufacturing and maintenance costs, and the like. In contrast, the improved vertical axis wind turbine has the advantages of low start-up wind speed, high wind energy utilization rate and low noise, and has a broader market application prospect. [0004] During the use of wind turbines, in order to avoid the sudden increase of wind force and bring harm to the operation of the u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/06F16D55/22F16D65/32F16D65/28
CPCF05B2260/902F05B2260/903Y02E10/723Y02E10/74F03D3/005F03D7/0248
Inventor 蒋大龙王建辉
Owner NAT WIND ENERGY
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